Note 3 - Summary of Significant Accounting Policies (Details) - Gross-to-Net Sales Deductions (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross IGI product sales	$ 5,770	$ 2,114	$ 10,795	$ 4,380
Chargebacks and billbacks	1,884	562	3,468	1,222
Sales discounts and other allowances	504	175	1,001	365
Total reduction to gross product sales	2,388	737	4,469	1,588
Net IGI product sales	6,021	3,706	12,520	7,174
Gross Net Adjustments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net IGI product sales	$ 3,382	$ 1,377	$ 6,326	$ 2,792